Ventilator



Nov. 20, 1956 Filed Dec. 6, 1955 FVG.

FVG.

P. TI SHANAHAN VENTILATOR INVENTOR.

N0 20, 1956 P. T. SHANAHAN 2,771,020

Filed Dec' 6I 1955 /Zk FG 4.

INVENToR. PETE@ 7'? SMQ/WMM '.cap'afcity in av relatively small wall area.

This invention relates to ventilation devices, and more United Statesz Parent() particularly to an improved'remotely controlled ventilal 'i tion duct Afora building. v f

-V Amain ,object ofthe invention `is toa. provide a novel and improved ventilator .for use in `a `Wall of a building, saidventilator being relatively simple in construction,

lbeing ,easy to install, andtproviding: a ,large'ventilationw A further object of the invention is to provide an improved ventilator `for a building wall, said ventilator being inexpensive to fabricate, being durable in construction, being controlled remotely, so that it may be closed at times to save heat, and being `substantially inconspicuous in appearance so as not to adversely affect the external appearance .of the building in which it is employed.

Further objects iand advantages of the invention will y'become apparent from the following ydescription and claim, and trom the accompanying drawings, wherein: Figure l is a fragmentary front elevational view of the top portion of a building provided with an improved ventilator constructed in accordance with the present invention.

Figure 2 is a vert-ical cross sectional View taken through the wall of the building of Figure l substantially on the line 2.-2 of Figure 1.

Figure 3 is a horizontal cross sectional view taken substantially `on'the line 3 3 of Figure 2.

=Figure 4 is an enlarged vertical cross sectional view taken on the line 4 4 of Figure 1.

Figure 5 is a View Is-howing a blank employed to form `the main duct element of the improved ventilator of Figures l to 4.

Figure 6 -is a plan view of the blank employed to form the rectangular frame of the ventilator assembly of Figures l to 4.

Figure 7 is a plan View of the blank employed to tonm the damper element of the ventilator of Figures l to 4.

Referring to the drawings, 1f1 generally designates an improved ventilator assembly constructed in accordance with the present invention. The assembly 11 is adapted to be installed in a wal-l l1-2 of a building 13, for example, in the top portion of the build-ing wall, as shown in Figure 1. The ventilator assembly 11 comprises a rectangular trame 14 formed with a rectangular ange structure 15 adapted t-o be inserted through a rectangular opening 16 formed in the building wall 12, whereby the frame 14 engages against the outside surface of the wall adjacent t-he opening 16 and is secured to said wall by suitable fasteners 17, such as screws or rthe like, as shown in Figure 4. The rectangular ange structure 14 defines a seat which receives a generally rectangular duct 18, the seat being inclined upwardly and inwardly by a sma-ll angle, as shown in Figure 4, whereby the duct 18 is supported in an upwardly and inwardly inclined position. rThe forward end of the duct 18 i-s fastened to the ange 15 in any suitable manner, as by suitable screws 19 passing 'through the ange 15 and threadedly engaging in the duct 18.

2,771,020 Patented Nov..20, 1956 ICC y20, the il-aps 23 and 24,being then bent on fold lines 25 and 26 to overlapping relationship, the aps 24 and 2G being provided with respective bendable tab elements 27 and 28 which are interengagealble with each otherand which may be crimped together to `lock the structure in its folded position, delining the rectangular duct 18.

The Iblank .also includes a rectangular portion 30 aligned with the bottom wall portion 20 and the respective generally triangular side wall elements 31 and 32. The element 30 is foldable on av transverse fold line 33, and the side members =3l1and 32 are foldableon respective longitudinal :fold lines 34 and 35, to define an upward'ly opening channel at the inner end o-f the duct 18,

the `side members 31 and 32 beingsecured aft their respective forward margins 36 and 37 to the rear margins of the side wall elements 22 and21 of duct 18.

The respective side members 36 and 37 are provided with flange elements 38 and 39 which .are benda'ble outwardly on respective fold lines 40 and 41, and the bottom Wall member 30 of the upwardly facting end channel is provided with an end ange 42 which is bendable inwardly on a transverse fold line 43, and is so bent when the ventilator is fabricated, to provide stilening means for t-he upwardly facing channel mem-ber of the duct.

Extending rotatably through the intermediate portions of the `side walls 21 and 2v2 of the duct 18 is a transverse shaft 44 on which is secured a damper plate 45, said platev comprising a main body portion 46 and respective side aps 47, 47 which are bent at right angles to the main body 46 and through which the shaft 44 extends and t-o which said shaft i-s rigidly secured.

Rigidly secured to one end of shaft 44 is an external lever member 47 on which is threadedly engaged an adjustable counterweight 48. The lever 47 is engageable with a stop lug 49 secured to the adjacent side wall 21 of the duct 18. The end of the lever 47 is provided with an eye -lo'op y50, and secured thereto is the end of an operating cable 5'1, said cable passing over a pulley 52 provided above and laterally adjacent to the duct 18, said cable extending downwardly fso as to be operable Ifrom below. As shown in Figure 2, when the cable 51 is pulled, the lever 47 is rotated counterclock'wise, whereby the damper plate y45 may be rotated from a normally horizont-al-ly extending position to a substantially upright position, closing the duct 1-8. The weight A48 biases the plate member 45 to the aforesaid Lsubstantially horizontal normal position, shown in Figure 2.

A screen frame 53is secured externally on the ventilator supportin-g frame 14, said screen frame containing a foraminous screen member 54.

Under normal conditions, air is free to enter the top portion `of the building through the duct 18, the air entering the duct 18 and moving inwardly and upwardly from the duct through the upwardly and inwardly inclined end channel defined by bottom wall element 30 and side wall elements 31 and 32. T-he air is thus free to circulate through the building, and a relatively large volume of air will enter the building when the damper plate 45 is in its horizontal normal position, shown in Figures 2 and 4. When it is desired to `close the ducts, for example, during cold weather, it is merely necessary to pull the cable 5.1 from below, rotating the lever 47, and `causing the damper plate 45 to be rotated lfrom its full line position of Figure 4 to i-ts dotted view position shown therein, in which position the cable 51 may be secured, thus holding the damper valve in its upright closed position,

The biasing force tending to return the damper plate 45 to its horizontal open position may be adjusted by adjusting `the position of the -weight 48 on the lever 47. When the cable 51 is released, the weight 48 causes the lever 47 to return to the position thereof shown in Figure 2, thus opening the duct 18.

While a specific embodiment of an improved building ventilator has been disclosed in the foregoing description, it xwill be understood that various modifications within the spirit of the invention may -occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except yas defined by the scope of the appended claim.

What is claimed is:

In a building, a ventilator comprising a frame mounted wall inclined upwardly and away from the bottom wally of the duct at a relatively large angle and having side walls `secured to the side walls of the duct, defining an upwardly opening outlet `for the duct, horizontal shaft means rotatably mounted in the side walls of the duct, a damper plate elongated longer than the vertical height of said duct and transversely mounted on said shaft means, a lever member having one end fixedly secured to said shaft means externally of the duct in substantially the same plane as said damper plate, a countenweight adjustably mounted on said lever member, a stop member mounted on the side wall of the duct subjacent said lever member between the counterweight and said shaft means, limiting downward movement of Vthe lever member to substantially -a horizontal position thereof, a control cable secured to the free end of lsaid lever member, and pulley means on the building Wall above said frame, said cable passing over said pulley means, whereby said damper plate may be rotated to a substantially vertical position by exerting downward -force on the control cable.

References Cited in the file of this patent UNITED STATES PATENTS 846,542 Albertson Mar. 21, 1907 1,441,070 Edin Jan. 2, 1923 1,538,645 Markey May 19, 1925 1,766,876 Busby June 24, 1930 1,785,891 Danat Dec. 23, 1930 2,009,870 Black July 30, 1935 

